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Add consume() recipe to itertools docs.

This commit is contained in:
Raymond Hettinger 2009-03-09 11:55:25 +00:00
parent 5fa5d4febd
commit fa007965c8
1 changed files with 4 additions and 0 deletions
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4
Doc/library/itertools.rst
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@ -615,6 +615,10 @@ which incur interpreter overhead.
"Return function(0), function(1), ..." "Return function(0), function(1), ..."
return map(function, count(start)) return map(function, count(start))
def consume(iterator, n):
"Advance the iterator n-steps ahead. If n is none, consume entirely."
collections.deque(islice(iterator, n), maxlen=0)
def nth(iterable, n, default=None): def nth(iterable, n, default=None):
"Returns the nth item or a default value" "Returns the nth item or a default value"
return next(islice(iterable, n, None), default) return next(islice(iterable, n, None), default)